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Stock options (Tables) | 12 Months Ended
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Dec. 31, 2022
Schedule of Stock Option Fair Value Assumptions | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended December 31, 2022 |  | Year Ended December 31, 2021 |
Expected dividend | ​ | 0 | % | 0 | %
Risk-free interest rate |  | 1.18 - 3.96 | % | 1.41 - 1.62 | %
Expected volatility |  | 71 | % | 122 | %
Expected life |  | 5 - 6 years |  | 10 years | ​
​
Schedule of Restricted Share Unit Activity | ​
​ | ​ | ​
​ | ​ | Number of Restricted
US Denominated RSU's | ​ | Share Units (thousands)
Outstanding at December 31, 2020 |  | —
Granted |  | 219
Outstanding at December 31, 2021 | ​ | 219
Granted | ​ | —
Forfeited | ​ | (86)
Released | ​ | (98)
Outstanding at December 31, 2022 | ​ | 35
Currency, U.S. Dollar [Member] |
Schedule of Stock Option Activity | Summary of $USD Option Activity ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Number of | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Options |  | ​ | ​ |  | ​ | Weighted
​ | ​ | (in thousands) | ​ | ​ | Range | ​ | ​ | Average
Outstanding and exercisable at December 31, 2020 | ​ | 2,952 | ​ | $ | 0.45 – 12.59 | ​ | $ | 4.82
Granted | ​ | 1,412 | ​ | ​ | 4.08 – 7.53 | ​ | ​ | 5.93
Exercised | ​ | (11) | ​ | ​ | 1.05 – 5.10 | ​ | ​ | 3.15
Forfeited | ​ | (94) | ​ | ​ | 7.40 – 8.09 | ​ | ​ | 7.79
Outstanding and exercisable at December 31, 2021 |  | 4,259 | ​ | $ | 0.45 – 12.59 | ​ | $ | 5.13
Granted |  | 1,015 | ​ |  | 5.59 - 8.10 | ​ |  | 6.50
Exercised |  | (273) | ​ |  | 0.45 - 8.38 | ​ |  | 3.29
Forfeited | ​ | (462) | ​ | ​ | 5.59 - 8.10 | ​ | ​ | 6.79
Outstanding and exercisable at December 31, 2022 |  | 4,539 | ​ | $ | 0.45 – 12.59 | ​ | $ | 5.43
​ Summary of $USD Option Remaining Life
​ | ​ | ​ | ​ | ​ | ​
​ | Number Outstanding and Exercisable at | ​ | Weighted Average Strike Price | ​ | Weighted Average
​ | December 31, 2022 | ​ | December 31, 2022 | ​ | Remaining Life
​ | (in thousands) |  | US Dollars |  | (years)
​ | ​ | ​ | ​ | ​ | ​
​ | 4,539 |  | $5.43 |  | 6.67
​ | ​ | ​ | ​ | ​ | ​
​

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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